I just upgraded to a Denon AVR-2105 from a Marantz SR580, and lost AC-3 capability for LaserDisc in the doing. I was going to sell the Marantz for around $250, but found that an external RF Demodulator would cost at least as much. I am considering keeping the Marantz, running the LDs RF output to it, then to the Denon via the 6 analog pre-amp outs. Since the Marantz is somewhat “lacking” in bass management, I am concerned that this would affect the pre-amp out. Does anyone know if it is a straight pass-through from the internal demodulator to the pre-amp outs, bypassing any processing?